Tahvili M S, Du L, Heck M J R, Nötzel R, Smit M K, Bente E A J M
COBRA Research Institute, Eindhoven University of Technology, Den Dolech 2, 5600MB Eindhoven, The Netherlands.
Opt Express. 2012 Mar 26;20(7):8117-35. doi: 10.1364/OE.20.008117.
We present an investigation of passive and hybrid mode-locking in Fabry-Pérot type two-section InAs/InP(100) quantum dot lasers that show dual wavelength operation. Over the whole current and voltage range for mode-locking of these lasers, the optical output spectra show two distinct lobes. The two lobes provide a coherent bandwidth and are verified to lead to two synchronized optical pulses. The generated optical pulses are elongated in time due to a chirp which shows opposite signs over the two spectral lobes. Self-induced mode-locking in the single-section laser shows that the dual-wavelength spectra correspond to emission from ground state. In the hybrid mode-locking regime, a map of locking range is presented by measuring the values of timing jitter for several values of power and frequency of the external electrical modulating signal. An overview of the systematic behavior of InAs/InP(100) quantum dot mode-locked lasers is presented as conclusion.
我们对法布里 - 珀罗型双段InAs/InP(100)量子点激光器中的被动锁模和混合锁模进行了研究，这些激光器呈现出双波长工作特性。在这些激光器锁模的整个电流和电压范围内，光输出光谱显示出两个明显的波瓣。这两个波瓣提供了一个相干带宽，并被证实会产生两个同步的光脉冲。由于啁啾，所产生的光脉冲在时间上被拉长，且在两个光谱波瓣上呈现相反的符号。单段激光器中的自诱导锁模表明，双波长光谱对应于基态发射。在混合锁模状态下，通过测量外部电调制信号的几个功率和频率值下的定时抖动值，给出了锁模范围图。作为结论，给出了InAs/InP(100)量子点锁模激光器系统行为的概述。
